[英]Celery task calling itself after task succeeds without celerybeat
我想每當完成當前任務后每30分鍾調用一次celery任務,但是有時任務花費的時間比預期的要長,因為任務是從遠程服務器下載文件。 所以我不想使用celeryBeat。 另外,使用自我。 重試僅適用於我想是發生錯誤的時間。 這是我的任務:
@shared_task(name="download_big", bind=True, acks_late=true, autoretry_for=(Exception, requests.exceptiosn.RequestException), retry_kwargs={"max_retries": 4, "countdown": 3}):
def download_big(self):
my_file = session.get('example.com/hello.mp4')
if my_file.status_code == requests.codes["OK"]:
open("hello.mp4", "wb").write(my_file.content)
else:
self.retry()
更新:
好吧,我將結構更改為:
@shared_task(name="download_big", bind=True, acks_late=true, autoretry_for=(Exception, requests.exceptiosn.RequestException), retry_kwargs={"max_retries": 4, "countdown": 3}):
def download_big(url):
my_file = session.get(url, name)
if my_file.status_code == requests.codes["OK"]:
open(name, "wb").write(my_file.content)
else:
self.retry()
@shared_task(name="download_all", bind=True, acks_late=true, autoretry_for=(Exception, requests.exceptiosn.RequestException), retry_kwargs={"max_retries": 4, "countdown": 3}):
def download_all(self):
my_list = [...] # bunch of urls with names
jobs = []
for name, url in my_list:
jobs.append(download_big.si(url, name))
group(jobs)()
因此,在這種情況下,我必須調用download_all方法而不是download_big,這樣我可以並行下載文件,並且當所有小組任務完成后,都需要在30分鍾后再次調用自身。
您可以嘗試使用和弦 ,該和弦將運行一組任務,完成后將運行可用於重新安排時間的回調。
例如
from celery import chord
@shared_task(name="download_big", bind=True, acks_late=true, autoretry_for=(Exception, requests.exceptiosn.RequestException), retry_kwargs={"max_retries": 4, "countdown": 3}):
def download_big(url):
my_file = session.get(url, name)
if my_file.status_code == requests.codes["OK"]:
open(name, "wb").write(my_file.content)
else:
self.retry()
@shared_task(name="download_all", bind=True, acks_late=true, autoretry_for=(Exception, requests.exceptiosn.RequestException), retry_kwargs={"max_retries": 4, "countdown": 3}):
def download_all(self):
my_list = [...] # bunch of urls with names
jobs = []
for name, url in my_list:
jobs.append(download_big.si(url, name))
# Run the group and reschedule once all tasks complete
chord(jobs)(download_all.apply_async(countdown=1800))
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